初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值? 求大神解题,谢谢!

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初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?初一数学题         |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?           求大神解题,谢谢!
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初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值? 求大神解题,谢谢!
初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?
初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值? 求大神解题,谢谢!

初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值?初一数学题 |m+n-5|+(2m+3n-5)²=0,求(m+n)²的值? 求大神解题,谢谢!